Method and apparatus for vulcanizing rubber packing upon a cylindrical article



. r 1,621,000 J. c, CRowLEY US FoR vULcNZNG RUBBER PAcKING UPoN A cYLINDRICALI ARTIcLE Fi1ed Dec, 4 1924 March 15,1927- MBTHOD -ND APPARAT 2 Sheets sheet 1- Pafenfed M, 15,1927.-

UNITED STA ES PATENT oFFICE.

A Hcation med December 192. seria1 1o. 753,8o2.

The )feSent invention feloteS to n1ethod and apparalus fofvu1canizing 8 rubber pok ing u on a borrel-1ike obiect, The nethod alld aPParatuS are particulofly a licoble 5 foI' vulcanizing a rubber packiI1g fing u on the outside of cylindriCal baffe1 forII11ng 8 aft of vnlve inSideS for uSe in the volve Stexns of PneuInotic tiTeS and Silnilar devices, but there afe ceftin featureS of the inven 10 fion vhich are 11ot ited to the PreciSeuSe to Which it iS put. 4

The obiect of tho inVention iS to Provide an eB1cient n1ethod nd one Which can be cofried on at lovv cost, and Which v7i11 fur 16 ther I)rovide a S3tiSfaCt0ry vvay of diSPoSing of the fiaSh of rubbof hich ofdinarily at facheS to the art vulcanized on the cy1indric1 obiect, thuS doing ay vvith the neCes- Sity of o SubSeqnent operation foI' the Te 20 n1ovol of the Tubber HaSh,

l,efere11ce Sh011ld be hod to the aoco1npany ing droWings fofming o part of this S ecifioat1on, in vvhich ig. 1 iS o toI) plaln vievv of 8 Inold; E ig. 2 is on endelevotion of the 11o1d Shown in Eig. 1 Eig. 3 iS o trnSverSe Section of porfion of the Inold. Shovvn in ig. 1 ig. is Sectiona1 elevation of o noId vith o cylindrico.l borre1 in PlaCe; 1g. 5 is o to 18n viev, and ig. 6 is o sectiono1 ShoWing o rubber sheet in I)loce vith the n1ol(1 and sutrounding the oyIindrico1 borre1; ig. 8 is o Section 1 e1evofi0I1 of a'porslleet, ond partS of the mold in oSition be fore ressure; 1 ig. 9 is o sect1onl elevation s ovving the Inold parts vvith the rubber and cyHndncal body in 1co With the 'Ino1(1 artS onder fesSure; 1g, 10 is o Sectional elevation vith ortions of the Tnold re lover II1old Section 1 is pfovided vvith aJ Se-.

- rieS of holeS dned through the same Which nre indicated of End odiaoent tho upper portion of those holos tho dioInete1' is invieW of o rubber Sheet vvit11,holes punched through it; ig.` 7 iS- Sectlona1 elevotion` t1on of the Ino1d Shovving t e barrel, rubber creased S iS indiCate(1 at 5. Thefe iS, there fore, a shoulder forn1ed at the upper end of eaoh of the o eningS 1. The interInedi 8to 1T1()ld SecfioI12 iS a Plato Tvhich isforIned v1th a nun1ber ofholes of' oPenings thfongh it corfeS onding to the number of o enings in the lovver II1old SectioI, ond W en the I)late 2 is asSeI1bled vith respeot to tho 11()1d eotion the openings iI1 he )late 2 vvi11 reg- 1Ster With the o eningS i11 the n1old section 3. The diameter of the openingS in the lafo 2 are the sanle aS the diaIneter of the en 1rged oftionS 5 of the openings in tho loWer section 1.

The mold section 3- is provided With o plurality of fecesses in the under foce there of, as indioated ot 6, theSe 1ecesses c0Tre S ondlng Tvith a Shouldel vvhich is fofned on the barfel of the valve inSides uPon vvhich the rubbeI' pack-ing is to be moldedin poSition. 1flere is oISo an opening 7 odjooent each )o1tion 6 of the Inold Section 3 through Whlch the up er end of the valve inSides n...y extend.

It Wi11, of courso, be undefstood thot Snit ob1e IneonS are )1'o vided foI' oper1 aHgn 1ng the various Sections of the lno d f71tfI TeS ect to eaoh other, ond nleans foI' holding the variouS Ino1d Sections clon1ped togethe1' during the vulcanizing operation.

In erfofming the vofions operotions in the 111olding of the fubber on the valve in Sides We Would fefe1' to Eigs, to 11 in oluSive.

1eferfing to I ig. the 1ove1 Section of the nlold is ShoWn, ond tho borre1 of o volve insides designated by the refefenoe nonlero1 8 is shoWn iI1 osition in the Inold. The bafrel of the valve inSideS hES o onge 9 Which seats into lhe receSS 5, and is Su orted u on the shoulder forlned ot to baSe of this recess. 1here is a1So onother ShouldeI 10 forned on tho barfe1 of the. v lve insides to vhich Tefefenco vvi11 1ote1' be lnade.

The n1old Sectioo 1, oS Will be underStood, is provided vvith a plu aHty of openings. snch oS deScribed onff in theSe oPeningsfllfongllout the extent thereofin the Inold Section the barfe1S for the valve insideS Wi11 be mounfed aS indioofed in ig 4. Sheef of unvulCnnized rubber, Such nS indiCnted at 11 iS )1'oviaed fith o nunlber of S Hced punched` out poftions oiroulaf i=1 oufline,

1,o31,ooo

therethrough and 1cing the rubber Sheet upon the firSt IIlentioned Inold nleInber vvith the O ening Surrounding )OI'tion of the groove in the cylindrical article, thon r0vid ing a lnold late h ing a SubStantially ciroular o ening vhich iS Slightly gfeater in diaIneter than the dialneter of the groove in tl1e artiole, then providing a mol(1 part WhiCh haS an opening tha COSely fit u on the ex tending end of the cyHndrical a1'ticle, then co111I)I'eSSing t11e n ()1(1 I)artS so that the TubbeI' Sheet iS coInpreSSed and the rubber forced into the groove of the oylindrical artiole and Confined by the o ening iI1 the second n)e 1tioned Inold paft, 8nd vulconizing the Tubber vvhile the Inold aTtS are un de1 PreSSure.

5. A n101(1 foI vulconizing rubber in p0 Sition upon a oylindrico1 orticle ooII1 riSing n]old paft having an opening thefethrough into vvhioh one end of the article to be vuL canized is Supported, a Second Inold part having a ciTou1 o ening rvv11ich is of sub Stantinny the SaIne diaeter S the OPening in the fSt n1entioned Inold part, thiI'd 1TlQ1(1 part Which is adapted to besuperiIn p0Sed u on the Second II1old art Tvhich part haS n opening throu h vvhich the cy1indri cal article Inay exte1 vhen in position.

6. A II10](1 in Which fubber Inay be vnloaniZed upon a cylindrioal artiole comprising o Inold IneInber having on opening vhiCh haS o shoulder for sup orting the Sai(1 cy]in drical 9ul'ticle, 8 )1te rovided vvith o oirC11- lar o )ening vhlch is of S11bStntia11y t}1e saIne diaIneter as the portion of the opening above the Shoulder in the first Inentioned Inold neInber, aJ third 111old Part vvhioh haS Bn o ening adopted to oloSely fit the eXtend ing end of the cylindrioa1 article.

In teStin1ony WhereOf, heTennto afx ny Signature.

JoHN o oBovVLEY. 

